Hey there! So... I was reading the Aquapolis Preview (here), and I noticed something interesting while reading it.

Upon opening these chests, should players either encounter a server error or be unable to enter within the specified time limit due to instances being fully occupied, they will receive the master thief's map. Players with the master thief's map in their possession will be able to summon a teleportation ward by using the general action Dig near the area indicated on the map.
If I may make a proposal, could you have the dragonskin treasure map instead have a chance to drop a Master Thief's Map (at the same rate as a portal would appear, mind you) instead of spawning a portal? I feel people who do dragonskin maps may or may not be prepared to dive into the Aquapolis with the party they are currently in, and may want to save their Aquapolis opportunity for later.